gas line check valve Description
Gas pipeline check valve is a unidirectional flow control device dedicated to the gas transmission system. It automatically blocks the backflow of gas to prevent safety hazards such as flashback explosion and pipeline pressure imbalance caused by medium backflow. It is a key component for gas safety protection.
Structural composition
Main components
Valve body: mostly made of cast steel, stainless steel or nickel-based alloy (such as Inconel), resistant to high pressure and corrosion (sulfur and other impurities in gas);
Valve flap: Common structures include lifting disc valve flap (suitable for small-diameter high-pressure pipelines) or swing-type double eccentric sealing valve flap (suitable for medium and large-diameter low-pressure scenarios).
Sealing system
Hard sealing structure: The valve seat and valve flap adopt metal-metal sealing (such as tungsten carbide spraying), which is resistant to high temperature and adapts to gas flow rate fluctuations;
Elastic compensation layer: Some designs are superimposed with polytetrafluoroethylene gaskets to enhance the sealing reliability of low-pressure working conditions.
Auxiliary mechanism
Gravity/spring reset device: When installed vertically, the valve disc relies on its own weight to close, and a spring is added to assist in rapid closing in horizontal pipelines; Anti-static device: Integrated conductive components (such as copper wire mesh guide chain) to avoid static sparks generated by gas flow friction
gas line check valve specification
|
Warranty |
1 year |
|
Type |
Check valves |
|
Customized support |
OEM, ODM |
|
Brand Name |
GNEE |
|
desgin |
BS1688 |
|
Structure length |
ASME B16.10 |
|
Flange connection size |
ASME B16.5 |
|
Testing and Inspection |
API 598 |
|
Pressure and temperature benchmark |
ASME B16.34 |
gas line check valve
Application and industry value
| Functional Dimension | Specific functions | Solving industry problems |
|---|---|---|
| Flashback and explosion prevention | Block the reverse flow of gas to prevent flashback from igniting residual gas in the pipeline | Reduce the risk of explosion accidents caused by gas leaks (e.g. the leakage accident rate at LNG receiving stations can be reduced by more than 70%) |
| Protecting power equipment | Prevent high-pressure gas from flowing back and impacting the impeller when the gas compressor stops, thus avoiding equipment damage | Extend the life of gas booster units and reduce maintenance costs |
| Maintaining stable pressure | Maintains pressure balance in the pipeline network by closing quickly to avoid regulator failure due to reverse flow | Improve the operational stability of urban gas pipeline systems |
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